VDB
CVE-2025-20335
CVE-2025-20335
PUBLISHED
CVSS 5.300000190734863 MEDIUM
A vulnerability in the directory permissions of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 could allow an unauthenticated, remote attacker to write arbitrary files on an affected device. This vulnerability is due to a lack of proper authentication controls. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to perform arbitrary file writes to specific directories in the underlying operating system. Note: To exploit this vulnerability, Web Access must be enabled on the phone. Web Access is disabled by default.
EPSS 0.05% · 15.6th percentile
Risk Scores
CVSS 3.1
5.300000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS Score
0.05%
15.6th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Session Initiation Protocol (SIP) Software | 10.3(1.9) 3rd Party, 11.0(2)SR2, 11.0(4)SR1 |
| cisco | ip_phone_8841_firmware | 14.3\(1\), 14.3\(1\), 0 |
| cisco | video_phone_8875_firmware | 0, 2.3\(1\), * |
| cisco | ip_phone_8811_firmware | 14.3\(1\), 14.3\(1\), 0 |
| cisco | desk_phone_9871_firmware | * |
| cisco | ip_phone_8861_firmware | 14.3\(1\), 0, 14.3\(1\) |
| cisco | ip_phone_7811_firmware | 0, 14.3\(1\), 14.3\(1\) |
| cisco | ip_phone_8851_firmware | 14.3\(1\), 14.3\(1\), 0 |
| cisco | ip_phone_7821_firmware | 0, 14.3\(1\), 14.3\(1\) |
| cisco | ip_phone_8845_firmware | 14.3\(1\), 0, 14.3\(1\) |
| cisco | desk_phone_9851_firmware | 3.0\(1\) |
| cisco | ip_phone_8851nr_firmware | 14.3\(1\), 0, 14.3\(1\) |
| cisco | ip_phone_7841_firmware | *, 14.3\(1\), 0 |
| cisco | desk_phone_9861_firmware | * |
| cisco | ip_phone_8821_firmware | *, 11.0\(6\), 11.0\(6\) |
| cisco | ip_phone_8865_firmware | 14.3\(1\), 0, 14.3\(1\) |
| cisco | ip_phone_7861_firmware | 14.3\(1\), 0, 14.3\(1\) |
| cisco | desk_phone_9841_firmware | 3.0\(1\) |
Exploit Intelligence
- CIRCL seen: CVE-2025-20335 (circl-sighting)
- cisco-sa-phone-write-g3kcC5Df (circl)
Timeline
- Oct 10, 2024 CVE ID Reserved
- Sep 3, 2025 CVE Published
- Sep 3, 2025 CVE Updated
- Sep 4, 2025 EPSS Score
- Sep 4, 2025 PoC Published
- Sep 12, 2025 EPSS Score
- Sep 19, 2025 EPSS Score
- Sep 27, 2025 EPSS Score
- Oct 3, 2025 Coalition ESS Score
- Oct 4, 2025 EPSS Score
- Oct 6, 2025 Coalition ESS Score
- Oct 12, 2025 EPSS Score